<template>
  <view class="uni-countdown">
    <view
      v-if="showDay"
      class="uni-countdown__number"
      :style="{borderColor:borderColor, color:color, background:backgroundColor}"
    >{{d}}</view>
    <view
      v-if="showDay"
      class="uni-countdown__splitor"
      :style="{color:splitorColor}"
    >天</view>
    <view
      class="uni-countdown__number"
      :style="{borderColor:borderColor, color:color, background:backgroundColor}"
    >{{h}}</view>
    <view
      class="uni-countdown__splitor"
      :style="{color:splitorColor}"
    >{{showColon ? ':' : '时'}}</view>
    <view
      class="uni-countdown__number"
      :style="{borderColor:borderColor, color:color, background:backgroundColor}"
    >{{i}}</view>
    <view
      class="uni-countdown__splitor"
      :style="{color:splitorColor}"
    >{{showColon ? ':' : '分'}}</view>
    <view
      class="uni-countdown__number"
      :style="{borderColor:borderColor, color:color, background:backgroundColor}"
    >{{s}}</view>
    <view
      v-if="!showColon"
      class="uni-countdown__splitor"
      :style="{color:splitorColor}"
    >秒</view>
  </view>
</template>
<script>
export default {
  name: "uni-countdown",
  props: {
    showDay: {
      type: Boolean,
      default: true
    },
    showColon: {
      type: Boolean,
      default: true
    },
    backgroundColor: {
      type: String,
      default: "#FFFFFF"
    },
    borderColor: {
      type: String,
      default: "#000000"
    },
    color: {
      type: String,
      value: "#000000"
    },
    splitorColor: {
      type: String,
      default: "#000000"
    },
    day: {
      type: Number,
      default: 0
    },
    hour: {
      type: Number,
      default: 0
    },
    minute: {
      type: Number,
      default: 0
    },
    second: {
      type: Number,
      default: 0
    }
  },
  data() {
    return {
      timer: null,
      d: "00",
      h: "00",
      i: "00",
      s: "00",
      leftTime: 0,
      seconds: 0
    };
  },
  created: function(e) {
    this.seconds = this.toSeconds(
      this.day,
      this.hour,
      this.minute,
      this.second
    );
    this.countDown();
    this.timer = setInterval(() => {
      this.seconds--;
      if (this.seconds < 0) {
        this.timeUp();
        return;
      }
      this.countDown();
    }, 1000);
  },
  beforeDestroy() {
    clearInterval(this.timer);
  },
  methods: {
    toSeconds(day, hours, minutes, seconds) {
      return day * 60 * 60 * 24 + hours * 60 * 60 + minutes * 60 + seconds;
    },
    timeUp() {
      clearInterval(this.timer);
      this.$emit("timeup");
    },
    countDown() {
      let seconds = this.seconds;
      let [day, hour, minute, second] = [0, 0, 0, 0];
      if (seconds > 0) {
        day = Math.floor(seconds / (60 * 60 * 24));
        hour = Math.floor(seconds / (60 * 60)) - day * 24;
        minute = Math.floor(seconds / 60) - day * 24 * 60 - hour * 60;
        second =
          Math.floor(seconds) -
          day * 24 * 60 * 60 -
          hour * 60 * 60 -
          minute * 60;
      } else {
        this.timeUp();
      }
      if (day < 10) {
        day = "0" + day;
      }
      if (hour < 10) {
        hour = "0" + hour;
      }
      if (minute < 10) {
        minute = "0" + minute;
      }
      if (second < 10) {
        second = "0" + second;
      }
      this.d = day;
      this.h = hour;
      this.i = minute;
      this.s = second;
    }
  }
};
</script>
<style>
@charset "UTF-8";

.uni-countdown {
  padding: 2upx 0;
  display: inline-flex;
  flex-wrap: nowrap;
  justify-content: center;
}

.uni-countdown__splitor {
  justify-content: center;
  line-height: 44upx;
  padding: 0 5upx;
  font-size: 28upx;
}

.uni-countdown__number {
  line-height: 44upx;
  justify-content: center;
  height: 44upx;
  border-radius: 6upx;
  margin: 0 5upx;
  font-size: 28upx;
  border: 1px solid #000;
  font-size: 24upx;
  padding: 0 10upx;
}
</style>
